/* 基础排版 */
body {
    font-family: "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    margin: 0;
    padding: 0;
}

/* 顶部导航 */
.navbar {
    background-color: #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-logo-text {
    text-decoration: none;
    color: #0066cc;
    font-weight: 600;
    font-size: 18px;
}

.nav-logo-text:hover {
    color: #0052a3;
}

.nav-link {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #0066cc;
}

.nav-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-logo-img {
    height: 35px;
    width: auto;
    max-width: 45px;
    object-fit: contain;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.nav-logo-img:hover {
    transform: scale(1.05);
}

.download-btn {
    background-color: #0066cc;
    color: white;
    padding: 8px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.download-btn:hover {
    background-color: #0052a3;
}

/* 当前页高亮 */
.nav-link[aria-current="page"],
.nav-logo-text[aria-current="page"] {
    color: #0066cc;
    position: relative;
}

.nav-link[aria-current="page"]::after,
.nav-logo-text[aria-current="page"]::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 2px;
    background-color: #0066cc;
    border-radius: 2px;
}

/* 主内容区域 */
.main-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px 20px 20px;
}

h1 {
    color: #0066cc;
    text-align: center;
    margin-bottom: 30px;
}

h2 {
    color: #0066cc;
    margin-top: 30px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.step {
    background-color: #f9f9f9;
    border-left: 4px solid #0066cc;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 0 5px 5px 0;
}

.step-number {
    font-weight: bold;
    color: #0066cc;
    margin-right: 10px;
}

.note {
    background-color: #fff8e6;
    border-left: 4px solid #ffcc00;
    padding: 15px;
    margin: 20px 0;
    border-radius: 0 5px 5px 0;
}

img {
    max-width: 60%;
    width: auto;
    height: auto;
    display: block;
    margin: 20px auto;
    border: 1px solid #eee;
    border-radius: 5px;
}

.faq-item {
    margin-bottom: 20px;
}

.faq-question {
    font-weight: bold;
    color: #0066cc;
}

/* 表单（预留） */
.feedback-form {
    margin-top: 20px;
    padding: 20px;
    background: #f5f5f5;
    border-radius: 8px;
}

.feedback-form h3 {
    margin-bottom: 15px;
    color: #333;
}

.form-group {
    margin-bottom: 15px;
}

textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    resize: vertical;
}

.submit-btn {
    background-color: #1890ff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #40a9ff;
}

/* 视频样式 */
.video-container {
    margin: 30px 0;
    text-align: center;
}

.video-container iframe {
    width: 100%;
    height: 400px;
    max-width: 720px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border: none;
}

/* 企业微信客服二维码样式 */
.wechat-support {
    margin-top: 30px;
    text-align: center;
}

.wechat-support-title {
    margin-top: 25px;
    margin-bottom: 15px;
    font-weight: 500;
    color: #333;
}

.qr-code-container {
    display: inline-block;
    padding: 20px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border: 1px solid #f0f0f0;
}

.qr-code {
    max-width: 200px;
    width: auto;
    height: auto;
    display: block;
    margin: 0 auto;
    border: none;
    border-radius: 8px;
}

.qr-code-desc {
    margin: 15px 0 0 0;
    color: #666;
    font-size: 14px;
    line-height: 1.4;
}

/* 联系方式指导样式 */
.contact-guide {
    margin: 20px 0;
    padding: 16px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

.guide-item {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    padding: 8px 0;
}

.guide-item:last-child {
    margin-bottom: 0;
}

.guide-icon {
    font-size: 16px;
    margin-right: 10px;
    min-width: 24px;
    text-align: center;
}

.guide-text {
    font-size: 14px;
    color: #475569;
    line-height: 1.4;
}

.guide-text strong {
    color: #334155;
}

.wechat-guide .guide-text strong {
    color: #059669; /* 绿色突出微信 */
}

.email-guide .guide-text strong {
    color: #0369a1; /* 蓝色突出邮件 */
}

/* 响应式适配 */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 10px;
    }

    .nav-left {
        gap: 15px;
    }

    .nav-link {
        display: none; /* 在移动端隐藏邀请码说明链接 */
    }

    .nav-logo-img {
        height: 35px;
        width: 35px;
    }

    .download-btn {
        padding: 6px 16px;
        font-size: 14px;
    }

    .video-container iframe {
        height: 300px;
        max-width: 100%;
        margin: 0 10px;
    }

    .qr-code {
        max-width: 180px;
    }

    .qr-code-container {
        padding: 15px;
        margin: 0 10px;
    }

    .qr-code-desc {
        font-size: 13px;
    }

    .contact-guide {
        margin: 15px 0;
        padding: 12px;
    }

    .guide-item {
        margin-bottom: 10px;
        padding: 6px 0;
    }

    .guide-icon {
        font-size: 15px;
        margin-right: 8px;
        min-width: 20px;
    }

    .guide-text {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .video-container iframe {
        height: 250px;
        border-radius: 4px;
    }
}